Hmmm, I have a x86 motherboard (Giga-byte GA-7VKMLS, in another Walmart bo= x)=20 that doesn't seem to mind two differently sized RAM sticks in A/B order b= ut=20 becomes intermittent (POST doesn't start 50% of the time at power on) whe= n in=20 B/A order. That is, if I swap the sticks, it works, and if I swap them ba= ck,=20 it is intermittent. The MOBO book says mixing sizes is Okay but obviously= =20 something is going on. The two sticks are marked: Value RAM, KVR-PC133/256, 3.3v, Kingston Value RAM, KVR133x64c3/128, 3.3v, Kingston Anyone recognize if I'm doing a No-No TIA --=20 Ed Skinner, ed@flat5.net, http://www.flat5.net/